Can someone please help. I bought a game for my computer without knowing that it was in 3D. Evidently my computer doesn't have 3D capacity. How can I download this 3D system so that I may play my games. Thanks a lot in advance for any help.

This is likely your graphics card which does not support 3D graphics in the game. Can you post the make/model of your PC and it will be easier to determine why you cannot play these games. Also whats the game?